I have a new mindee who has been potty trained and I have had her a few weeks now, we have had the odd accident here and there, but to be expected, but I have noticed that the last few times she has had them, she has been standing in the bathroom, in front of the toilet and says "Emma, I done a wee wee in my knicker, I need some new ones now, I want to wear the peppa pig ones/minni mouse ones/cinderella ones" etc She has previously gone in her bag before just to randomly change her knickers and I have said to leave them in there as we need them for spare - She is a very very clever little lady, so I am wondering if she is having accidents on purpose so she can change her knickers...

How can I deal with this?